In the music video for Billie Jean by Michael Jackson one interesting effect I noticed is on a billboard which show three different pictures of two women. It looks like the pictures were added in post production as opposed physically existing like a billboard that was shown earlier (1:45). You can see this in the official YouTube video at the 2:07 mark.
I believe that the pictures were added in post production because they shake independently of the camera and they also switch to three different images without any noticeable jump cut or transition further suggesting that they were added in post production. I've created a gallery showing the three billboard images.
Another interesting thing is the image reminds me of a 256 or less color image because of the posterization effect suggesting perhaps that the images were digitally stored or that the effect was digital.
How could this effect have been achieved in 1983? Could they have used a Quantel Mirage (released in 1982)? I think that one supported a higher color depth so I'm surprised by the posterization unless it was intentional. I know other devices could do that effect but I wasn't able to confirm that they existed prior to the release of the music video. These include the Abekas A-51 and the Bosch FGS-4000.